For now, it is always set to 0.  Later patches in this series will
ensure that all callers pass an appropriate combination of flags.
Signed-off-by: NMax Reitz <mreitz@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
Message-Id: <20200513110544.176672-6-mreitz@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>